Tubular lantern.



. No. 835,806. I PATENTED NOV. 13, 1906.

r G. BBRGBNBR.

TUBULAR LANTERN. APPLICATION FILED SEPT. 27 1904.

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, To all whom it may concern:

U ITE STATES I PATENT. OFFICE.

GHARLES BERGENER, or RocH-Esr nmNEW YORK, AssicNoR To THE 0. T. HAMMANUFALTURINGCOMPANY, OF'ROCH'ESTER, NEW-YORK.

1 TUBULAR LANTERN.

Specification of Letters Patent;

' Patented Nov. 13, 1906.

Be it known that 1, CHARLES BER ENER, a citlzen of the United States,residing at Rochester, in the county of Monroe and State of New York,have invented a new and useful Improvement in Tubular Lanterns, of

which the following isa specification.

This invention relates to that class of tubular lamps and lanterns inwhich the tubes are supplied mainly with fresh or external air and onlyto a limited extent with air which is more or less contaminated byproducts of combustion, and has. special reference to a lantern of thisgeneral character in which the chimney is surrounded by an air-chamberwhich receives the air for the supply of the flame-from below and inwhich the chimney is vertically movable toward and from the globe forholding or releasing the latter. lantern of that kind is disclosed, forinstance,

in my Letters Patent No. 378,648, datedFebthe same parts.

ruary 28, 1888.

The object of this invention is to improve the devices whereby air issupplied to the airchamber with a view of avoiding the injection of anexcessive quantity of air into the chamber and also preventing excessivedownward blasts in the chimney.

In the accompanying drawings, Figure 1 is a side elevation of the upperportion ofa tubular lamp or lantern provided with my improvements,showing the chimneyresting on the globe. Fig. 2 is a sectional elevationof Fig. 3 is a similar sectional elevation at right angles to Fig. 2,but showing the chimney raised from the globe. Figs. 4 and 5 arehorizontal sections in lines 4 4. and 5 5, Fig. 2, respectively. Fig. 6is a fragmentary diagrammatic vertical section of the lamp-top on anenlarged scale.

Like letters of reference refer to like parts in the several figures.

A represents the side tubes of a tubular lamp or lantern, and B theair-chamber, to the side of which the upper ends of the tubes aresecured. Upright deflecting-plates a, may be arranged in the air-chamberacross the mouth of each air-tube. The lower portion of the lamp orlantern may be constructed in any suitable or well-known manner.

C represents the globe, and D the chimney, which rests upon the globeand holds the latter in place in the lantern.

E represents the usual spiral spring, which surrounds the chimney andholdsthe latter yieldingly upon the globe, so that by raising thechimney against the pressure of this spring the globe is released. Thisspring bears with its lower portion against an. annu lar shoulder d, orsome othersuitable stop on the chimney and with its upper portionagainst the top I) ofthe air-chamber or some other suitable stop on thesame. A cross wire 6 extends through vertical slots 6 in the chimney,which slots guide the chimney and also establish communication betweenthe interior of the chimney and the air-chamber.

The air-chamber is closed at the top by its inturned top portion or walland is open at the bottom for the injection of air for the sup port ofthe flame. F represents a horizontal injecting-flange arranged below theopen lower end of the air-chamber and secured thereto by depending armsf, formed on the air-chamber, or other suitable means, so as to formair-inlets g between the flange and the air-chamber. The flange isprovided at its inner edge with an upturned collar h, which projectsupwardly on the inner side of the lower portion of the air-chamber andis separated from the chimney by an air-pas sage i. The flange isfurther provided with a guide-ring or perforated gallery K, in which thelower portion of the chimney is guided.

L represents an upright air-deflecting collar or cylindrical wall whicharranged around the upper portion of the chimney and extends a shortdistance above and below the upper edge of the chimney. Thisinjecting-collar is separated from the chimney by an annular air-passageZ and may be secured to the chimney by legs Z or by other suitablemeans. This collar fits snugly in the inturned top portion 1) of theair-chamber, so as to slide therein in raising or lowering the chimney,and may be provlded with an external stop or bead m, which limits thedownward movement of the chimney.

M represents the cap or top plate, which is arranged at a suitableheight above the chimney and injecting-collar and which is preferablysupported by legs m from the collar. The chimney and its surroundingdefleotin -collar are open at the top, so that under or inary conditionsthe products of combustion escape freely from the chimney and collar inan upward direction.

The upright deflecting collar or cylinder L does notextend downwardtozthe mouths of the air-tubes and does not obstruct the airchamber Bbetween the tubes and the chimney. Air-currents which tend to move upwardly or downwardly in the air-chamber between the mouths of the tubesand the chimney are not intercepted or deflected by this collar. When anair-current blowing obliquely into the space between the cap and theinjecting-collar strikes the latter, it is in part deflected downwardlythrough the passage Z between the collar and the chimney and passesdownwardly through said passage into the air-chamber. Such deflectedcurrents are by this means prevented from blowing down the chimney withfull force, which is objectionable, because such blasts cause the flameto smoke and sometimes extinguish the same. The part of the currentwhich is deflected downwardly through the annular passage Zinto theair-chamber flows downwardly through said chamber and difluses itselftherein more or less, according to the strengthof the current. If thedownwardlydeflected current has considerable strength, a considerablepart of the current will pass directly downwardly through theair-chamher and escape therefrom through the passages at the lower endof the chamber. This avoids an excessive injection of air into the tubesand the depression of the flame resultingtherefrom. On the other hand,when a blast strikes the ai-rechamber in an upward direction and entersthe lower portion of the chamber withgreat force it will vent itself byescaping in part upwardly through the airpassage between theinjecting-collar and the chimney, thus avoiding an excessive injectionof air into the tubes from that cause. This injecting-collar modifies inthese and other ways the action of downward as well as upwardair-currents and prevents excessive action in either case, but does notobstruct the air-chamber or interfere with the diffusion of the airtherein, thereby rendering the flame steadier and brighter.

I claim as my invention 1. In a lamp or lantern, the combination of anair-chamber having a closed top, which resists the escape of the airfrom the chamber in an upward direction, and having at its bottom apassage for the ingress and egress of air, an air-tube connected withsaid chamber, a chimney arranged within said chamber, an uprightdeflecting-collar which surrounds the upper portion of the chimney andextends above and below the top edge of the same, said collar beingseparated from the chimney by an annular air-passage and having itslower edge arranged above the mouth of the air-tube, and a cap whichsurmounts the chimney and collar, substantially as set forth.

2. In a lamp or lantern, the combination of an air-chamber having aclosed top, which resists the escape of the air from thechamber inanupward direction, and havingat its bottom a passage for the ingress andegress of air, an air-tube connected with the outer wall of saidchamber, a chimney arranged within said chamber, an uprightdeflecting-cylinder which surrounds the upper edge of the chimney andextends a short distance above and below the same but'leaves theair-chamber at the mouth of the tube and below the same unobstructed,said cylinder being separated from the chimney by an air-passage whichopens into the upper portion of the air-chamber, and a cap whichsurmounts the chimney and cylinder, substantially asset forth.

Witness my hand this 17 thrday of September, 1904.

CHARLES BERGENER. Witnesses:

EDWARD WILHELM, O. B. HonNBEoK.

